Question

ahmed has some 20 cent and 50 cent coins box there are 80 coins in all and the total amount is 29.80 how many 50 cent coins dose ahmed have​

Answer 1

Answer:

ahmed has some 20 cent and 50 cent coins box.

there are 80 coins in all and the total amount is 29.80

$0.2x + 0.5y = 29.80 \\ and \\ x + y = 80$

So,

0.2x + 0.2y = 16

Solving the equation

0.3y = 13.80

y = 13.80/0.30 = 46

y = 13.80/0.30 = 46and x = 80 - 46 = 34

Ahmed have 46 number of 50 cent coins.

Answer 2

Step-by-step explanation:

Let no of 20 cent coin is represented by x

So total 20 cent coins will be 20 x

Converting in two dollars it will be we have to divide it by 100 we will get 0.2 x

Let no of 50 cent coin is represented by y

So total 50 cent coin will be 50 y

Converting it into dollars 0. 5 y

Total cost of coins equation

0.2 x + 0.5y = § 29.80

x + y = 80

Solve this simultaneous equation we will get

Y =46

X=34